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Negative-index bianisotropic photonic metamaterial fabricated by direct laser writing and silver shadow evaporation

机译:通过直接激光写入和银影蒸发制备的负折射率双各向异性光子超材料

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摘要

We present the blueprint for a novel negative-index metamaterial. This structure is fabricated via three-dimensional two-photon direct laser writing and silver shadow evaporation. The comparison of measured linear optical spectra with theory shows good agreement and reveals a negative real part of the refractive index at around 3.85 (mu)m wavelength--despite the fact that the metamaterial structure is bianisotropic owing to the lack of inversion symmetry along its surface normal.
机译:我们提出了一种新型的负折射率超材料的蓝图。这种结构是通过二维两光子直接激光写入和银影蒸发来制造的。将测得的线性光谱与理论进行比较显示出良好的一致性,并且揭示了在约3.85μm波长处折射率的负实部-尽管超材料结构由于其沿缺乏反转对称性而具有各向异性。表面法线。

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